What information is an executor or a will required to share with beneficiaries?

My sister was left executor (executrix) of my fathers will. My father has 6 children and named the oldest as executrix. She has all legal rights to take care of his estate. His biggest asset is his house that needs to be sold, and everything is to be divided equally between the 6 children. She will not let any of her siblings have a say in anything, such as yard work being done at his property or which real estate agent will be used. She is now not speaking to any of us and said she will direct all questions to her lawyer. Is this legal? Isn't there information she HAS to share with us as beneficiaries? And how long can she drag out selling the house. There is nothing holding it up other than her hiring a real estate agent, and she has not done that yet. It's been 4 months since my father has passed.